In a sport team each player has a clear role, and there are few occasions ______ members are confused or uncertain of their roles.
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A
why
B
where
C
when
D
in which
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With economy getting worse，we have reached the point________we have to cut down our daily expenses.
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A
that
B
which
C
when
D
where
The teacher set such difficult problems ______ nobody could work out _____ none of us passed the test.
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A
as; that
B
that; as
C
/; that
D
as; as
The new buyer identified a dozen new sources for the material, ___________ proved to be reliable．
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A
most of them
B
most of which
C
most of whom
D
most of those
________ is known to us all, our government has spared no efforts to control food prices.
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A
What
B
Which
C
As
D
It